FlowDocument flowDoc = new FlowDocument(new Paragraph(new Run("A bit of text content...")));

// Change various default typography variations.
flowDoc.Typography.Capitals               = FontCapitals.SmallCaps;
flowDoc.Typography.CapitalSpacing         = true;
flowDoc.Typography.CaseSensitiveForms     = true;
flowDoc.Typography.ContextualAlternates   = false;
flowDoc.Typography.ContextualLigatures    = false;
flowDoc.Typography.DiscretionaryLigatures = true;
flowDoc.Typography.EastAsianExpertForms   = true;
flowDoc.Typography.EastAsianLanguage      = FontEastAsianLanguage.Traditional;
flowDoc.Typography.EastAsianWidths        = FontEastAsianWidths.Proportional;
flowDoc.Typography.Fraction               = FontFraction.Stacked;
flowDoc.Typography.HistoricalForms        = true;
flowDoc.Typography.HistoricalLigatures    = true;
flowDoc.Typography.Kerning                = false;
flowDoc.Typography.MathematicalGreek      = true;
flowDoc.Typography.NumeralAlignment       = FontNumeralAlignment.Proportional;
flowDoc.Typography.NumeralStyle           = FontNumeralStyle.OldStyle;
flowDoc.Typography.SlashedZero            = true;
flowDoc.Typography.StandardLigatures      = false;
flowDoc.Typography.Variants               = FontVariants.Ruby;